// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_PUBLIC_BROWSER_ZYGOTE_HOST_LINUX_H_
#define CONTENT_PUBLIC_BROWSER_ZYGOTE_HOST_LINUX_H_

#include <unistd.h>

#include "base/process/process.h"
#include "content/common/content_export.h"

namespace content {

// https://chromium.googlesource.com/chromium/src/+/master/docs/linux_zygote.md

// The zygote host is an interface, in the browser process, to the zygote
// process.
class ZygoteHost {
public:
    // Returns the singleton instance.
    CONTENT_EXPORT static ZygoteHost* GetInstance();

    virtual ~ZygoteHost() { }

    // Returns the pid of the Zygote process.
    virtual bool IsZygotePid(pid_t pid) = 0;

    // Returns an int which is a bitmask of kSandboxLinux* values. Only valid
    // after the first render has been forked.
    virtual int GetRendererSandboxStatus() const = 0;

    // Adjust the OOM score of the given renderer's PID.  The allowed
    // range for the score is [0, 1000], where higher values are more
    // likely to be killed by the OOM killer.
    virtual void AdjustRendererOOMScore(base::ProcessHandle process_handle,
        int score)
        = 0;
};

} // namespace content

#endif // CONTENT_PUBLIC_BROWSER_ZYGOTE_HOST_LINUX_H_
